Focusing means



Feb. 18, 1941. H. E. POWELL FOCUSING MEANS Original Filed Jan. 21, 1939 ILE. Powe LL INVENTOR.

ATTORNEYS.

Patented Feb. 18, 1941 UNITED STATES PATENT OFFICE Original application January 21, 1939, Serial No. 252,228. Divided and this application August 24, 1939, Serial No. 291,747

1 Claim.

This application comprises matter divided out of my pending application Serial No. 252,228, filed January 21, 1939.

The invention aims to provide a simple but 5 effective focusing means for a lamp of any desired kind, for instance, a lamp of the type used on an automobile.

It is within the province of the disclosure to improve generally and to enhance the utility of 1 devices of that type to which the present invention appertains.

With the above and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without de- 20 parting from the spirit of the invention.

In the drawing:

Fig. 1 is a vertical longitudinal section, and Fig. 2 is a longitudinal horizontal section, parts being broken away in each view.

25 In carrying out the invention, there is provided a tapered lamp body I. The body I has a spherical boss 29 at its rear end, the boss being connected to the body by a reduced neck. A reflector 5 is disposed within the body I. A lens 30 6 is assembled with the body I, in advance of the reflector 5. A cylindrical deflector II is mounted for axial rotary adjustment on the forward portion of the body I.

The reflector 5 has a tubular guide 25 at its 5 rear end, in which is slidably mounted a socket 26 carrying an electric lamp 21. U-shaped yoke 28 is provided, and the forward, depending arm of the yoke is secured to the rear end of the socket 26. A screw 39 is mounted to 40 turn in the spherical boss 29 of the body I. The

An inverted,

screw 30 is threaded into the rear depending arm of the yoke 28. 7

An abutment 31 is seated in the rear end of the lamp body I at the forward end of the neck.

A compression spring 32 is interposed between 5 the abutment 3| and the yoke 28. By rotating the screw 30, the socket 26 may be advanced or retracted, thereby focusing the lamp 21, the spring 32 serving to keep the head of the screw engaged with the boss 29 of the lamp body I. A 1 suitable supporting means 34 is provided, and comprises a spherical part receiving the boss 29. The spherical part of the supporting means has an elongated slot exposing the head of the screw 30, and narrow enough to direct a screw driver into the keri of, the head of the screw 30.

The device forming the subject matter of this application is simple in construction but it affords a satisfactory operative and improved means for focusing a lamp, in a device of the class described.

Having thus described the invention, what is claimed is:

In a lamp-focusing device, a body having a spherical boss at its rear end, and provided with a reduced neck connecting the body with the boss, a reflector disposed in the body, a lamp holder slidable in the reflector, an abutment seated in the body at the forward end of the neck, a yoke secured to the holder, a screw threaded into the yoke and having a head engagingthe body and provided with a kerf, the screw being rotatable in the abutment, a compression spring interposed between the yoke and the abutment, and a support having a spherical 35 part receiving the boss, said part being provided with an elongated slot exposing the head and narrow enough to direct a screw driver into the kerf.

HARRY E. POWELL. 

